Method testRandom

JSAT/test/jsat/linear/MatrixTest.java:131–146

Test of random method, of class Matrix.

()

     * Test of random method, of class Matrix.
     */
    @Test
    public void testRandom()
    {
        System.out.println("random");
        int rows = 100;
        int cols = 100;
        Random rand = RandomUtil.getRandom();

        DenseMatrix result = Matrix.random(rows, cols, rand);
        OnLineStatistics stats = new OnLineStatistics();
        for (int i = 0; i < result.rows(); i++)
            for (int j = 0; j < result.cols(); j++)
                stats.add(result.get(i, j));
        //if its all random from [0, 1], the mean should be 0.5
        assertEquals(0.5, stats.getMean(), 0.05);
    }

    /**
     * Test of diag method, of class Matrix.